2A Work Session 2015 0126 - Laserfiche WebLink

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SAN LEANDRO SHORELINE DEVELOPMENT DRAFT EIR CITY OF SAN LEANDRO BIOLOGICAL RESOURCES removal of the existing pilings, docks and piers in the existing marina, creation of enhanced natural shoreline along the interior of the existing marina, installation of new piers, docks and pedestrian bridge over the mouth of the entrance to the existing marina, and installation of an aeration fountain to improve water quality in the existing marina basin. Construction could result in disturbance to aquatic habitat of the bay, requiring drilling and excavation for pier/dock installation and shoreline modifications, and suspending silts and other substrate within the construction zone. This could result in a temporary reduction in water quality, or inadvertent injury or loss of individual special -status fish species, if present within the construction zone. The new piers and docks would shade areas of open water, but the removal of the existing dock system in the marina basin would result in a substantial net reduction in shading of open water habitat as part of the Project. Details of the Aeration fountain are not available, but special - status and other fish species could be routinely entrained in the pumping system if adequate screening at the intake locations is not provided and maintained. Appropriate construction avoidance measures would be necessary to prevent possible loss of one or more of these species, and appropriate authorizations may be required from NOAA Fisheries, USFWS, and/or CDFW where "take" of special -status fish species may occur as a result of the in -water activities of the Project. This would be considered a significant impact. Impact BIO -1B: Proposed development could result in inadvertent loss of special -status fish species and other aquatic species as part of in -water construction activities if adequate controls are not implemented. Mitigation Measure BIO -1B: Prevent Inadvertent Loss of Special -Status Fish and Aquatic Life. Appropriate construction controls and restrictions shall be taken to prevent inadvertent loss of special -status fish species and other aquatic life as a result of construction activities within or near areas of tidal influence and open water habitat of San Francisco Bay to avoid possible inadvertent take of Central California Coastal steelhead, green sturgeon, Delta smelt, Sacramento splittail, Central Valley spring -run chinook salmon, and longfin smelt, if present in the area during the time of construction. This shall be accomplished with the following provisions: ■ Adequate measures shall be taken to minimize disturbance and sedimentation in aquatic habitat of the bay, which may include installation of silt curtains around in -water construction zones, restrictions on in -water operations to low tide periods, and timing restrictions for in -water construction, among other possible controls and restrictions. ■ Any pumping as part of dewatering construction areas or as part of the proposed aeration fountain shall be adequately screened according to the latest screening guidelines of the CDFW, USFWS, and NOAA Fisheries to prevent entrainment of special -status fish and other aquatic life during their operation. ■ Any in -water construction activities shall be restricted to the period from June 15 through October when stray or dispersing special -status fish species would most likely not be expected within the affected areas. ■ The applicant shall obtain all necessary authorizations from the CDFW, NOAA Fisheries, and USFWS as required by federal and State law for potential harm to special -status fish species. Such authorization would be obtained as a result of interagency coordination through the Army Corps Section 404 consultation and the CDFW Section 2081 Incidental Take Permit process. The Project shall adhere to any additional conditions and restrictions required as part of the authorizations from regulatory agencies. PLACEWORKS 4.3-15